Mechanism for making tubes from metallic ingots



Patented Ian. 3, I899;

DAVI BES L. I]. S MECHANISM FOR MAKING TU I FROM METALLIC IIIGOTS.

(Application filed J (No Model.)

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ATTORNEY.

Nrrnn LEONARD D. DAVIS, OF ERIE, PENNSYLVANIA.

MECHANISM FOR MAKING TUBES FROM METALLIC INGOTS.

SPECIFICATION forming part of Letters Patent No. 617,083, dated January 3, 1899.

Application filed January 25, 1898. $erial No, 667,915. (No model.)

To all whom it may concern.-

Be it known that I, LEONARD D. DAVIS, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Mechanisms for Making Tubes from Metallic Ingots; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to mechanism for making tubes from metallic ingots; and it consists in certain improvements in the construction thereof, as will be hereinafter fully described, and pointed out in the claims.

The object of the invention is to provide a mechanism capable of piercing an ingot of metal for the purpose of forming metal tubes and of altering the shapes and sizes of pierced ingots.

The invention is illustrated in the drawings, as follows:

Figure 1 shows a section of the device on the line 1 1 in Fig. 2. Fig. 2 shows a side elevation of the device.

The essential and peculiar features of the invention comprise the disks A and B, mounted on the shafts a and b, respectively, the piercing-mandrel D, provided with the point d, and the locks E E for guiding the ingot in the pass. The frame for supportingthese different parts is not shown, as it can readily be supplied by any mechanic familiar with the art.

The disk A, as will be seen by the drawings, is somewhat smaller than the disk B, and both disks are dished on their contiguous faces. This arrangement and shape of the disks makes the space between the disks at the pass F greater than the space between the opposing surfaces at the peripheries which form the working pass G.

The dishing of the larger disk allows the ingot to be passed into the cavity formed in the disk, and thus to be readily presented to the working pass. By dishing the smaller disk more room is given for the guide-blocks and supports; but such shaping of the smaller disk is not essential to the operation of the mechanism, as the cavity in the larger disk alone will allow the passing of the ingot, as described.

The disks are placed face to face, or, ex pressed in another way, the line of the axis of the smaller disk passes within the periphery of the larger disk. They rotate in opposite directions, and their speed is preferably so proportioned as to give both the same peripheral travel. The axes of the disks are preferably parallel, and one is at one side of the pass or line of travel of the ingot and the other at the opposite side. As shown, the axis of the smaller disk is above the pass and the axis of the larger disk below the pass. The purpose of this arrangement of the axis is well known. The result of it is that the working surfaces a b of the disks contact and move against the ingot at angles less than right angles, so that they not only pro duce a rotary movement of the ingot, but also an end thrust, which feeds the billet, forcing it over the mandrel, and thus piercing it. In order that the end thrust of both disks may be the same, and thus balance each other, the guide-blocks are preferably so positioned as to bring the line of travel of the ingot enough nearer the axis of the smaller disk to make the angle of contact of the working surface of the smaller disk the same as that of the larger disk.

What I claim as new is 1. In a mechanism for making tubes from metallic ingots, the combination of a larger rotating disk dished on its working face and having a working surface at or near its periphery; a smaller disk facing said larger disk with the line of its axis passing within the periphery of said larger disk and parallel to the axis of the larger disk and arranged to rotate in a direction opposite to that of the larger disk and being provided with a working surface, which, by the position of the disks, is brought into opposition to the work ing surface of the larger disk; and a mandrel arranged in the line of travel of the ingot.

2. In a mechanism for making tubes from metallic ingots, the combination of a larger rotating disk dished on its working face and having a working surface at or near its periphery; a smaller dish-shaped disk, facing said larger disk with the line of its axis pass ing Within the periphery of said larger disk, and arranged to rotate in a direction opposite to that of the larger disk and being provided with a working surface at or near its periphery, which, by the position of the disks, is brought into opposition to the Working surface of the larger disk; and a mandrel arranged in the line of travel of the ingot.

3. In a mechanism for making tubes from metallic ingots, the combination of a larger rotating disk dished on its working face and having a Working surface at or near its periphery a smaller disk facing said larger disk with the line of its axis passing within the periphery of said larger disk and arranged to rotate in a direction opposite to that of the larger disk and being provided with a working surface, Which, by the position of the disk is brought into opposition with the working surface of the larger disk, said disks being arranged with the line of the axis of one of them at one side of the line of travel of the ingot and the line of the axis of the other at the opposite side of the line of travel of the ingot; a mandrel arranged in the line of travel of the ingot; a guide arranged to make the line of travel nearer the axis of the smaller disk than the axis of the larger disk. In testimony whereof I affix my signature in presence of two Witnesses.

LEONARD D. DAVIS. Vitnesses:

J. F. WALTHER, H. O. LORD. 

